Boiler for cooking purposes.



` No. renace. i

f UNI-TED STATES Patented September 8, 1903. i

PATENT OFFICE.'

LOUIS JOSEPH RENOY, OEAUOH,l FRANCE.

`BOILER FOROOOKING PURPOSES.

SPECIFICATION `forming partof Letters Patent No. 738,698, datedSeptember 8, 1903. Application nea naar e. 190e.- saiu No. 146,558. onman.)

To cir/ZZ whom t may concern.-

Be it known that I, LOUIS JOSEPH RENOY, a citizen of the Republic ofFrance, residing at Auch, in the Republic of France, have inventedcertain new and useful Improvements in Boilers for Cooking Purposes,(for which I have applied fora patent in France, dated February 6, 1903,and in Great Britain, 4dated September 9, 1902;) and I do hereby declarethefollowing to be a full, clear, and exact description of theinvention, suoli as will enable others skilled in theart to which itappertains to make and Vuse the same.

` The present invention relates to a boiler for cooking food,concentrating gravies, or the like, and mainly consists of a receptacleclosed by a cover of the form of a pointed arch which is surrounded by acylindrical casing, the whole being arranged in such a manner that thecooking temperature can be regulated according1 to requirements and thatthe steam-pressure, forming itself in the receptacle, can be kept inadetermined degree. The chief advantages Which arise from this inventionare, -first, quicker cooking of all food, and consequently smallerexpenses in fuel, and, second, the preservation of nearly all thearomatic and azotic parts which get lost with cooking methods generallyused.

The heating of the boiler can be effected by steam or by any otherheat-generating device; but in the latter case .the boiler has only asingle lbottom without any auxiliary contrivances, instead of a doubleone, as later on described.A

A boiler heated by steam and according to this invention is representedin the accompanying drawing, which represents a vertical section of aboiler constructed in accordance with my invention. p

ct represents the receptacle of the boiler in which are placed the waterand materials to be cooked. The materials rest upon a perforated plateb, which prevents their contact With the bottom tofthereceptacle. G isthe pointed arched coverof the boiler, which, being inclosed in acylindrical casix g d, is fixed to the latter.A The casing serves, whenquite or partly iilled with Water, as a cooling device, in Order toregulate,` at will the cooking temperature. The receptacle and thecover, be-

ing made of tinned iron plates or any other to the extentrequired.

suitable material, are 4provided with flanges e ef, The top one, e, `hasa groove, in which is placed an elastic ring f, the flange e' having aprojection or rib e2 entering said groove and engaging said ring. Bothflanges are tightly connected by screw-bolts g, thus uniting thereceptacle and the cover. The boiler has, further, an outlet-cock z' forreleasing the condensed water, which latter itself, inside of i thecover during the cooking process, runs from the inner walls of the coverinto a channel-like place s, left between the receptacle a and the coverC. The cover possesses a safetyevalve j and a pressure and temperatureindicator k.

The free space between the cylindrical cas ing dand the cover C can beilled with cold Water by means of a tube Z, which is led'to the bottomof the casing. The water introduced by this tube may run out again by acock m, thusforming a continuous circulation of the Water contained inthe cooler.

f As shown in the drawing, a second bottom 'n is Xed to the bottom t ofthe receptacle in `order to heat the boiler by steam.

o indicates a steam pressure gage; p, a steam-inlet cock, and q thesteam-outlet cock, fixed to the bottom n.

fr represents an outlet-tube provided with `of partitions dividing theboiler into a plural-A ity of separated independent compartments.

This, boiler cooks very quickly, (one hour instead of seven or eighthours is suflicientg) but in this case it is indispensable to bring thetemperature to about 120o centigrade, which is easily obtained by a veryreduced heat.

The `cooking' process is regulated by pour= ing into the cooler d a moreor less quantity of cold water, which allows the steam generatedWithin'the closed boiler to be condensed The Water arising from suchcondensation is collected by the channel s and let out by itscock Whenthe flow of the water on` thesurface of the cover is stopped, thepressure rises'jin the interior of the cover; but this pressure isquickly reduced when the iiow ofthe water is set on again.

When the cooking of the food is finished, thel heating of the boilermust be stopped, thereby continuing the cooling of the cover by means ofthe water-flow. The pressure in the boiler is then destroyed, and afterhaving unbolted the cover it can be taken off. If

necessary, a sample of the food may be taken,

and if the latter is not sufficiently cooked or concentrated the coverneed 'only be put on and closed again, and the operation is carriedfurtherby heating the boiler and cooling the cover.

Having thus fullydescribed my invention, what I claim as new, and desireto secure by Letters Patent of theUnited States, is-

A boiler of the class described comprising a receptacle with liange, anarched cover having a surrounding-casing forming a waterjaoket, and aflange, means secured Within said casing for filling the same, the endof the receptacle fitted loosely within the adjacent `end of the coverand extended beyond the same with a space therebetween, and a spacecommunicating therewith between the adjacent edges of the flanges andmeans for forming a water-tight joint between the flanges of thereceptacle and cover, as and for the purpose specified.

In testimony whereof I affix my signature.

LOUIS JOSEPH RENOY.

In presence of EMILE GEIMONT, PAUL FOLLEY.

